linux-kernel - Re: [PATCH v2] MIPS/bpf: Enable bpf_probe

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Date:   Mon, 22 Mar 2021 05:46:56 +0100 (CET)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2] MIPS/bpf: Enable bpf_probe_read{, str}() on MIPS
 again

On Thu, 18 Mar 2021, Tiezhu Yang wrote:

> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index 160b3a8..4b94ec7 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -6,6 +6,7 @@ config MIPS
>  	select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT
>  	select ARCH_HAS_FORTIFY_SOURCE
>  	select ARCH_HAS_KCOV
> +	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE

 Hmm, documentation on ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE seems rather 
scarce, but based on my guess shouldn't this be "if !EVA"?

  Maciej